Improvement in extensible gas-tubes fob chandeliers



H. McAVVOY.

Drop Light.

nel @s3-wirr anni @Mitica HUGH L ;"MCAVOY, OF BALTIMORE, MARYLAND, ASSIGNOR TO HIMSELF AND SAMUEL AULT, JR., 0E SAME PLACE.

Letters Patent No. 100,171, dated February 22, 1870; antedated February 10., 1870.

IMPROVEMENT IN EXTENSIBLE GAS-TUBES FOR CHANDELIERS.

The Schedule referred to in these Letters Patent and nakng part of the sannev To all whom it may concern Be it known that I, HUGH L. MoAvoY, of the city of Baltimore, in the State of Maryland, have invented a new and useful Improvement in Extensible Pipes for Gas, dto.; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, which are made a part of this specih'cation.

My invention consists, essentially, in making the pipe, ora sufficient portion of the same, of some suitable flexible material, coiling it in suitable form, and supporting this form or shape by one or more elastic wires, applied externally or internally of the pipe.

My invention further consists in the combination with said pipe of suitable guides and stops, to laterally support it andlimit its extension,'and to adapt it for gas chandeliers; also', in the employment of a suitable detlector, to protect it from the heat of the bumer.

The drawing represents anl elevation of a gas chandelier-,embodying my invention in a preferred form.

A represents a flexible pipe, which may be made of soft metal, rubber, or other dexible material, and which, for use, is made to assume the shape of a helix orA spiral coil, as represented.

B represents a wire,'of brass or other elastic substance, arranged longitudinally of the pipe A, externally on its top (as shown) or bottom, or internally in suitable manner, and suitably attachedv thereto. In its most contracted or normal state, the pipe, as shown',

Vwould assume the form of a fiat coil, or approximate thereto, the individual coils passing one within the other, if necessary, and in this state would occupy a very small space. To extend it, it is only necessary to draw it out, as represented in the. drawing, when the coils, separating and contracting in diameter, adapt a considerable elongation with but little strain, regulated necessarily by the length ofthe pipe and the nature of the material of which it is composed.

rlhe elastic wire B strengthens the pipe and preserves its helical form. It may further, to any desired extent, assist or serve wholly to contract or eX- tend the pipe, if desired. The extensible pipe A B is shown in the drawing as applied to a gas chandelier to adapt a burner to be lowered or dropped, as desired, which is the primary object or use for which the invention is intended.

O C represent stationary pipes or legs of a chandelier;

c c, the burners thereof;

c1, a neck, for attachment to the main or supplypipe; and

c2, a neck, for the attachment of thepipe A B.

d represents the drop burner, and D D its pipe or hollow frame.

' The helical pipeA B is attached at its center and apical end to the neck-cl of the pipe C C c, and by its outer coilsurrounds and is united with the frame I), being connected with its interior by one 4or more perforations or apertures.

E E represent tubular guides, attached to the inner sides of the legs C C of the chandelier, or to other convenient part by suitable means, and serving to receive guide-rods F F, projecting upward from the frame D. p

f f represent studs or pins on the guide-rods F, occupying longitudinal slot-s in the guide-tubes E, and

serving, by coming in Contact with the lower ext-remity of their paths, formed by rings e surrounding the guide-tube E and crossing said slots, or by other means, to limit the movement of the drop to any desired extent.

G represents a deector, composed, preferably, of number of inverted hollow truncated cones, supported" a small distance apart, and the-apex of the upper covi ered by a concave cap, as represented, which, being arranged within the coil of the pipe A B, over the burner d, as shown, serves to deflect the heat arising from the flame of said burner, and thus prevents injury to the material of which the pipe A is composed.

d d represent arms of the frame D, for the support of the detiector G. .A

The elastic wire B, in this and any other use of the extensible pipehmay serve to contract or extend it, or to assist in performing -those operations, as before stated, or a 'suitably-applied weight or separatcspring may be employed, to extend or contract it when released fro'm a suitable catch, which would in that case be employed to hold it in the other position from that to which said weight or spring would have a tendency to draw or press it.

The wire is preferably, especially in the use repre# sented, adapted to so support the pipe as that, by overcoming the friction of its guides, it may be adj usted to any desired extent, and will be held at that point by said friction.

' The absence of loose joints in my improved extensible pipe, and its highly ornamental appearance, adapt it peculiarly for theprimary usev indicated, but it may also, obviously, be employed for other purposes, wherever a tight, neat, compact, or easily-operated extensible pipe is re uired.

The precise form 1n which the extensible pipe is coiled, maybe varied, to adapt the pipe for different localities or for other purposes, if desired.

Having thus described my invention,

I claim and desire to secure by Letters Patent- 1. The flexible pipe A, coiled in suitable form, and having this form or shape supported. by one or more elastic wires, B,-extending longitudinally thereof, and

attached thereto, substantially as herein shown and tially as shown, the deilector G, constructed, arranged,

described. and employed substantially as represented and de 2. In combination with the extensible pipe A B, scribed, for the purpose set forth.

the guides E F E F, provided with the stops ef e f, HUGHV L. MGAVOY. substantially as and for the purpose set forth. Witnesses:

3. In combination with the extensible pipe A B Taos. M. NORms,

and drop D d d', constructed and connected substanlV. H. MASSON. 

